EP3524873A1 - Module lumineux de projection efficace comportant des microprojecteurs pour un phare de véhicule automobile - Google Patents

Module lumineux de projection efficace comportant des microprojecteurs pour un phare de véhicule automobile Download PDF

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Publication number
EP3524873A1
EP3524873A1 EP19152459.4A EP19152459A EP3524873A1 EP 3524873 A1 EP3524873 A1 EP 3524873A1 EP 19152459 A EP19152459 A EP 19152459A EP 3524873 A1 EP3524873 A1 EP 3524873A1
Authority
EP
European Patent Office
Prior art keywords
lens
input
micro
light module
projection light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19152459.4A
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German (de)
English (en)
Other versions
EP3524873B1 (fr
Inventor
Martin Licht
Christian Buchberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marelli Automotive Lighting Reutlingen Germany GmbH
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Automotive Lighting Reutlingen GmbH
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Publication date
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Publication of EP3524873A1 publication Critical patent/EP3524873A1/fr
Application granted granted Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0052—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0056—Arrays characterized by the distribution or form of lenses arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/005—Diaphragms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
    • F21W2102/155—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions having inclined and horizontal cutoff lines

Definitions

  • the present invention relates to a projection light module for a motor vehicle headlight according to the preamble of claim 1.
  • a projection light module is known from WO 2015/058227 A1 known.
  • the known projection light module has a primary optics collecting light source and a plurality of microprojectors each having an input lens, an output lens, and a micro-diaphragm disposed between the input lens and the output lens, the input lens being configured to be incident from the primary optics Focusing light of the light source in a lying between the input lens and the output lens focal range and wherein the output lens is arranged in light emanating from the focal region of the light source.
  • Conventional projection modules for motor vehicle headlights have an overall optical depth of the order of 75 mm to more than 120 mm.
  • This category includes halogen and xenon headlamps.
  • Light sources of both categories become several hundred degrees hot in operation. In their vicinity, temperatures are reached that are incompatible with the use of fine-structured plastic optics.
  • the light distribution is generated by a mask in the focal surface of a suitable projection lens.
  • a suitable projection lens can, for example, be a filter (slide, LCD) which is illuminated and generates a light distribution that is imaged via a projection objective.
  • a finely structured, controllable on pixel level integrated LED light source can be mapped via a projection lens, so that their finely structured variable light source distribution is projected onto the road.
  • an imaging lens secondary optics
  • a reduction of the lens and in particular its space requirement, or the depth co-determining focal length would require that the LED arrays can be reduced accordingly (shortening the focal length is the same image size, ie with the same size of light distribution on the street, with a Reduction of the object size, so the size of the light-emitting surface within the headlamp accompanied.)
  • a reduction of the light-emitting surface are currently set technical limits, so that the reduction of such headlights with only one optical beam path can not be sufficiently advanced.
  • the depth of such headlamps down to values between about 60 mm and is limited to about 100 mm.
  • the input lenses take over the distribution of the wide light beam emerging from the primary optics.
  • a light beam emerging from an input lens illuminates a micro diaphragm arranged between the input lens and the output lens.
  • the micro-aperture is usually an absorber plate which cuts the light beam illuminating it by absorbing shadowing.
  • the wall thickness of the micro-diaphragms is for example 0.1 mm.
  • Each of the light distributions resulting between in each case one micro-aperture and one respective output lens is so small that, while maintaining the size of its image in the apron, ie with a change of the image scale, a significant Shortening the focal length and thus the depth of such microprojectors can be achieved. It is a reduction of the factor of about 1/3 to 1/8 compared to a conventional projector. Decisive for the reduction are the size of the light source and its luminance.
  • the projected light distributions of the microprojectors overlap in the apron to a total light distribution of the headlight module.
  • the number of microprojectors is, for example, between 30 and 40.
  • the micro-diaphragms are realized, for example, as edge-limited openings in a foil.
  • each micro-diaphragm has a reflection surface with an input-lens-side end and an output-lens-side end, wherein the output-lens-side end projects into the focal region and the input-lens-side End is arranged inclined relative to an optical axis of the microprojector so that the reflection surface is illuminated with light emanating from the input lens of the light source and light of the light source reflected from the reflection surface falls on the output lens.
  • a preferred embodiment is characterized in that a wall thickness of the micro-diaphragm lying between the input-lens-side end and the output-lens-side end is between 0.5 mm and 1.5 mm.
  • the reflection surface is a smooth surface.
  • the reflection surface is a flat surface.
  • a further preferred embodiment is characterized in that the reflection surface with an optical axis of the associated microprojector includes an angle which is greater than zero degrees and which is less than or equal to 5 degrees.
  • the reflection surface has a reflective coating.
  • micro-diaphragm has, in addition to the reflection surface, a further input-side boundary surface.
  • a further preferred embodiment is characterized in that the input-side further interface is aligned perpendicular to an optical axis of the associated microprojector and with the reflection surface forms an angle which is greater than 90 degrees and which is less than or equal to 95 degrees.
  • the reflection surface is then, for example, a plane lying obliquely to the optical axis.
  • reflection surface is also preferable for the reflection surface to be at right angles to the further boundary surface on the input lens side and for the micro diaphragm to be tilted towards the input lens.
  • the spacings between the input lenses and the micro-apertures be the same from microprojector to microprojector and that the distances between the micro-apertures and the output lenses from microprojector to microprojector are the same.
  • the input lenses and the output lenses are biconvex lenses.
  • a further preferred embodiment is characterized in that light-refracting surfaces of the input lenses and the output lenses facing the micro-diaphragms are planar surfaces.
  • micro-diaphragms are inclined around vertical axes when the projection light module is used as intended.
  • FIG. 1 a motor vehicle headlight 10 with a housing 12 having a light exit opening, which is covered by a transparent cover plate 14.
  • a projection light module 16 Inside the housing 12 is a projection light module 16.
  • the projection light module 16 has a light source 18, a primary optics 20 and a plurality of n microprojectors 22.1, 22.2, ..., 22.n.
  • the light source 18 is, for example, a semiconductor light source such as a light-emitting diode or laser diode or a group of such semiconductor light sources. Alternatively, the light source 18 may also be an incandescent lamp or a gas discharge lamp.
  • the primary optics 20 in the illustrated example is a reflective optical element in the form of a concave concave mirror reflector 24.
  • the primary optics 20 may also be a refractive optical element such as a lens or a refractive and reflective catadioptric optical element or constructed of a plurality of optical elements.
  • the primary optics 20 are positioned with respect to the light source 18 so as to detect light 26 emanating from the light source 18 and to focus on the plurality of microprojectors 22.1, 22.2, ..., 22.n.
  • Each microprojector has an input lens 28, an output lens 30, and a micro diaphragm 32 disposed between the input lens 28 and the output lens 30.
  • Each micro-aperture 32 has one of the input lens 28 facing the first broad side 34, one of the output lens 30 facing the second broad side 36 and the first broad side 34 and the second broad side 36 connecting narrow side 38.
  • the first broad side 34 forms an input-lens-side interface of the micro-diaphragm.
  • a spatial coordinate system is shown, which is defined by the optical axis O of the motor vehicle headlight 10, a horizontal H and a vertical V.
  • the direction of the optical axis O is the main emission direction of the projection light module 16.
  • the optical axes of the individual microprojectors 22.1, 22.2,..., 22.n are parallel to the main emission direction.
  • each microprojector 22. 1, 22. 2,..., 22. N As a result of illumination of the input lenses 28 between its input lens 28 and its output lens 30, an internal light distribution produced by the light source 18 and the primary optics 20 results from the output lens 30 is represented as an outer single light distribution in the apron of the projection light module 16.
  • the apron In a proper use of the motor vehicle headlight 10, the apron is, for example, on the road ahead of the motor vehicle.
  • the micro-aperture 32 of each micro-projector 22.1, 22.2,..., 22.n has a transparent part and a nontransparent part.
  • the transparent parts are realized for example as recesses in a diaphragm foil of metal.
  • the non-transparent parts are part of the diaphragm foil.
  • an outer total light distribution of the projection light module 16 then results as a result of a superposition of the individual light distributions generated by all the microprojectors in advance of the projection light module 16, since the microprojectors 22.1, 22.2,..., 22.n all have the same main emission direction. On a plane perpendicular to the optical axis screen surface, the individual light distributions are superimposed.
  • FIG. 2 shows an example of an arrangement of microprojectors 22 of a projection light module.
  • the individual microprojectors are arranged in rows next to each other and in columns one above the other.
  • the number of microprojectors in a row can be the same for all rows as the FIG. 2 shows.
  • Different lines can also have different numbers of microprojectors. This applies analogously to the number of microprojectors in the columns.
  • the number of microprojectors in a column can be the same for all columns as the FIG. 2 shows. Different columns can also have different numbers of microprojectors.
  • the individual microprojectors 22 are constructed as described above with respect to FIGS FIG. 1 and below with reference to the FIGS. 4 to 9 is explained.
  • FIG. 3 shows a single micro projector 40 of the known projection light module. Simplifying shows FIG. 3 in particular three light beams 42.1, 42.2, 42.3, which are incident on the input lens 28 coming from the primary optics.
  • the two upper light beams 42.1 and 42.2 pass through the micro-aperture 44 and are directed by the output lens 30 in the apron of the projection light module, to which the micro projector 40 belongs.
  • the lower beam 42.3 applies to an opaque part of the micro-aperture 44. This beam is absorbed by the micro-aperture 44 and is therefore lost for the total light distribution to be generated.
  • the micro-diaphragm 44 is here a part of a recesses-containing diaphragm foil made of metal.
  • the thickness (wall thickness) of the diaphragm foil is, for example, 1/10 mm in the case of the known microprojectors.
  • Efficiency is understood to mean the proportion of electrical energy invested in the light source, which ultimately contributes to the desired total light distribution in the form of light. Increasing the light output requires an increase in electrical energy and, for example, requires larger and heavier heat sinks for the light source, ultimately leading to higher manufacturing costs and operating costs.
  • FIG. 4 shows a micro projector 22.m representative of each of the microprojectors 22.1, ..., 22.n from the FIG. 1
  • FIG. 4 shows a micro projector of an embodiment of an inventive Projection light module 16.
  • Each microprojector 22.m has in each case an input lens 28, an output lens 30 and a micro diaphragm 32 arranged between the input lens 28 and the output lens 30.
  • the input lens 28 is configured to emanate from the primary optics 20 FIG. 1 forth incident light 26 of the light source 18 from FIG. 1 to focus in a lying between the input lens 28 and the output lens 30 focal region 45.
  • This property of the input lens 28 is achieved by the geometry of the refractive surfaces of the input lens 28, the refractive index of their material, and their arrangement on the optical axis O.
  • the output lens 30 is in outgoing from the focal region 45 light 26 of the light source 18 from FIG. 1 arranged.
  • the micro-diaphragm 32 has a reflection surface 46 with an input-lens-side end 46.1 and an output-lens-side end 46.2.
  • the reflection surface 46 is located in the narrow side 38 FIG. 1 or is identical to this.
  • the exit-lens-side end 46. 2 projects into the focal region 45.
  • the input-lens-side end 46.1 is inclined relative to the optical axis O of the microprojector 22.m, so that the reflection surface 46 with light 26 emanating from the input lens 28 of the light source 18 emerges from the light source 18 FIG. 1 is illuminated and reflected by the reflection surface 46 light of the light source 18 falls on the output lens 30.
  • a wall thickness of the micro diaphragm 32 lying between the broad sides 34 and 36 is between 0.5 mm and 1.5 mm.
  • the input-lens-side end 46.1 lies between the reflection surface 46, which represents an interface of the micro-diaphragm 32, and a further interface, which is formed by the broadside 34, on the input-lens side.
  • the first broad side 34 forms another entrance-side boundary surface of the micro-aperture.
  • wall thickness of the micro-aperture 32 is compared to about 1/10 mm measuring wall thickness of the diaphragm film of the known projection light module increases.
  • the increased wall thickness is preferably between 0.5 mm and 1.5 mm. Based on the 1/10 mm thick wall thickness of the diaphragm film of the known projection light module, this corresponds to a magnification factor of 5 to 15.
  • the maximum value of the wall thickness can be limited in particular by the manufacturing method used.
  • the at the micro projector 22.m as a reflection surface 46th serving narrow side 38 is preferably realized as a smooth reflection surface 46, so that the reflected there light beams 42.3 to the output lens 30 are reflected.
  • the reflective surface 46 is preferably a flat surface. Such a flat surface can be produced, for example, by a laser cutting method.
  • the smaller of the two angles which includes a surface normal 46.n of the (plane) reflection surface 46 of a microprojector 22.m with the optical axis O of the microprojector 22.m, is between 85 degrees and 90 degrees , which is synonymous with the fact that the reflection surface 46 includes an angle w even with the optical axis O of the associated microprojector 22. m, which is greater than zero degrees and which is less than or equal to 5 degrees.
  • the smaller of the two angles opens to the entrance lens 28. This is preferably true for at least a majority of the microprojectors of the projection light module, but it can also apply to all microprojectors of the projection light module.
  • Such an inclination is associated with the fact that the surface normal 46.n has a component 46.O which runs parallel to the optical axis O and points toward the input lens 28.
  • the inclined reflecting surface 46 is at right angles to each of the two broad sides 34, 36, and the micro-aperture 32 is tilted as a whole to the input lens 28 out.
  • the reflecting surface 46 preferably has a reflective coating 47, such as is produced by vapor deposition of the reflecting surface 46 with metal. Reflecting reflections that occur at the broad side 34 facing the input lens 28 can produce disturbing light effects as a kind of disordered, vagabanding, undefined scattered light.
  • the first broad side 34 is preferably covered during the coating of the reflection surface 46, so that, as a result, it has no reflective coating.
  • a sum of the widths of juxtaposed microprojectors of a projection light module is less than 30 mm and that a sum of the heights of superposed microprojectors of a projection light module is less than 30 mm.
  • the width extends at a proper use in the horizontal direction and perpendicular to the optical axis O.
  • the height extends when used as intended in the vertical direction and perpendicular to the optical axis O.
  • a further preferred embodiment is characterized in that the widths of the microprojectors (each individually) are smaller than 6 mm, the heights of the microprojectors (each individually) are smaller than 4 mm and the depth of each one lens of the microprojectors is smaller than 6 mm , The depth extends in the direction of the optical axis.
  • the width extends when used as intended in the horizontal direction and perpendicular to the optical axis, and when used as intended, the height extends in the vertical direction and perpendicular to the optical axis.
  • FIG. 5 shows a section through a micro projector 22.m, the micro-aperture 32 is arranged in the micro-projector 22.m so that the broad sides 34 and 36 are arranged perpendicular to the optical axis O.
  • An inclination of the narrow side 38 (and the same with the narrow side reflection surface 46) to the input lens 28 results in the subject of the FIG. 5 by an oblique gate of the micro-aperture 32.
  • the oblique gate is such that the desired slope of the surface normal 46.n and thus the reflection surface 46 results.
  • the oblique gate can be generated by a corresponding inclined laser beam.
  • the reflecting surface 46 includes in the plane of the drawing an angle w with the optical axis O which is greater than zero degrees and less than 5 degrees, which corresponds to an angle between the surface normal 46.n and the optical axis O which is less than 90 degrees and greater than 85 degrees. This angle opens towards the entrance lens 28.
  • FIGS. 6, 7 and 8 show exemplary embodiments of arrangements of microprojectors 22.m according to the invention projection light modules.
  • the individual microprojectors 22.m each have an input lens 28, a micro diaphragm 32 and an output lens 30, which are each arranged in this order along an optical axis O.
  • FIGS. 6, 7 and 8 have in common that the first broad sides 34 of the micro-apertures 32 in one Escape and that the second broadsides 36 are also in flight.
  • microprojectors 22.m with respect to each one of FIGS. 6, 7, and 8 in that the spacings between the input lenses 28 and the micro-apertures 32 are the same from microprojector to microprojector and that the distances between the micro-apertures 32 and the output lenses 30 from microprojector 22.m to microprojector are the same.
  • the imaging properties of the microprojectors 22.m each differ one of FIGS. 6, 7 and 8 not each other.
  • each two adjacent input lenses 28 are arranged offset to one another along the optical axis, so that there is a step between them.
  • each two adjacent output lenses are mutually offset along the optical axis, so that there is a step between them.
  • the step results, in particular, between the refractive surfaces 28.1 of adjacent input lenses 28 facing the micro-aperture 32 and between the refractive surfaces 30.1 of mutually adjacent output lenses 30 facing the micro-aperture 32.
  • the input lenses 28 and the output lenses 30 are biconvex lenses.
  • the input lenses 28 and the output lenses 30 are biconvex lenses.
  • the output lenses 30 become thereby parallel to the optical axis O lying stages between each other adjacent refractive surfaces of the input lenses 28 avoided, and there are also parallel to the optical axis O lying steps between adjacent refractive surfaces of the output lenses 30 avoided.
  • an ensemble of lenses which is produced as a one-piece lens array by plastic injection molding, can be easily dissolved out of the injection mold. This applies both to the array of input lenses 28 and to an array of output lenses 30.
  • the input lenses 28 are components of a one-piece input lens array, and the output lenses 30 are each part of another one-piece output lens array.
  • the light-refracting surface 28.1, 30.1 of the respective lens array facing the micro-diaphragms 32 is realized in each case as continuous flat surfaces.
  • the planar surface of each opposite curved surface of each input lens 28 and each output lens 30 is then asymmetrically shaped to ensure the desired focus on the lying in the narrow side 38 of the associated micro-aperture 32 reflection surface.
  • FIG. 9 shows an array of four microprojectors 22a1, 22a2, 22b1, 22b2, of which two microprojectors 22a1, 22a2 combined into a block A and two of which microprojectors 22b1, 22b2 are combined into a block B.
  • Each block A, B is characterized in that the input lenses of its microprojectors are arranged in the same direction in the direction of the optical axis O and that the output lenses of its microprojectors in the direction of the optical axis at same place are arranged.
  • the input lenses of the first block are located at location x1.
  • the input lenses of the second block are located at location x2.
  • the output lenses of the first block are located at location x3.
  • the output lenses of the second block are located at location x4.
  • the blocks A, B are thus staggered along the direction of the optical axis O, that is, offset from one another.
  • the two blocks A, B are arranged offset from one another such that a mean distance of the input lenses of a block from their respectively associated micro-aperture 32 is equal to the average distance of the input lenses of the other block from their respectively associated micro-aperture 32.
  • the input lenses of each block have different focal lengths.
  • An input lens of a block having a greater distance from its associated micro-aperture than another input lens of the same block from its associated micro-aperture has a greater focal length than the other input lens. That means, for example, that in the FIG. 9 lower input lens has a larger focal length than that in the FIG. 9 upper entrance lens.
  • the output lenses of each block also have different focal lengths.
  • An output lens of a block having a greater distance from its associated micro-aperture than another output lens of the same block from its associated micro-aperture has a greater focal length than the other output lens.
  • the focal lengths are in each case so on the distances that the input lens of each microprojector focuses light from the light source into the same focal region 45 which is imaged by the output lens of the same microprojector into the projection of the projection light module, the reflection surface of the associated micro-diaphragm projecting into this focal region.
  • FIG. 9 thus shows a projection light module having microprojectors, which are each arranged in a paired use of each other when used as intended and wherein the superimposed microprojectors are arranged offset in a direction of the optical axis of the microprojections to each other.
  • the projection light module has first microprojectors and second microprojectors, which differ in that a distance between the input lens and the micro-aperture of the first microprojectors is greater than a distance between the input lens and the micro-aperture of the second microprojectors and that the focal lengths of the input lenses of the first Microprojectors are larger than the focal lengths of the second microprojectors.
  • a narrow side of the micro-diaphragms is inclined around a (micro-aperture-specific) axis extending horizontally when used as intended.
  • the invention can also be implemented with a projection light module that produces a light-dark boundary running vertically when used as intended.
  • the micro-apertures, or the narrow sides of the micro-apertures are inclined around a vertically extending (micro-aperture-individual) axis. This corresponds to the figures of the application, if one reverses the directions H and V there.
  • the micro-diaphragms are inclined around and around a vertical axis (micro-diaphragm-individual) in the intended use the intended use horizontally extending (microblast individual) axis inclined around.
  • the input lenses and the output lenses are then arranged diagonally staggered according to the inclination of the reflection surfaces in the direction of the optical axis.
  • the number of microprojectors per block is not set to 2. Preferably, this number is between 2 and 10, including these limits.
  • the number of microprojectors per block may be different from block to block within a projection light module having a plurality of such blocks.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP19152459.4A 2018-01-30 2019-01-18 Module lumineux de projection efficace comportant des microprojecteurs pour un phare de véhicule automobile Active EP3524873B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018101991.2A DE102018101991B3 (de) 2018-01-30 2018-01-30 Effizientes, Mikroprojektoren aufweisendes Projektionslichtmodul für einen Kraftfahrzeugscheinwerfer

Publications (2)

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EP3524873A1 true EP3524873A1 (fr) 2019-08-14
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EP4015896A1 (fr) * 2020-12-18 2022-06-22 ZKW Group GmbH Dispositif de projection pour un phare de véhicule automobile

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KR20200141248A (ko) 2019-06-10 2020-12-18 에스엘 주식회사 차량용 램프
DE102020126716A1 (de) 2020-10-12 2022-04-14 Marelli Automotive Lighting Reutlingen (Germany) GmbH Projektionsvorrichtung für ein Mikroprojektionslichtmodul für einen Kraftfahrzeugscheinwerfer
KR20220089942A (ko) * 2020-12-22 2022-06-29 에스엘 주식회사 차량용 램프
WO2024102647A1 (fr) * 2022-11-08 2024-05-16 Atieva, Inc. Phare adaptatif à semi-conducteurs à contraste élevé
US11971148B1 (en) 2022-11-08 2024-04-30 Atieva, Inc. High contrast solid state adaptive headlight

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DE102009053581B3 (de) 2009-10-05 2011-03-03 Automotive Lighting Reutlingen Gmbh Lichtmodul für eine Beleuchtungseinrichtung eines Kraftfahrzeugs
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EP0999407A2 (fr) 1998-11-05 2000-05-10 Automotive Lighting Italia Spa Phare adaptatif pour véhicules automobiles avec matrices de microlentilles
DE102009053581B3 (de) 2009-10-05 2011-03-03 Automotive Lighting Reutlingen Gmbh Lichtmodul für eine Beleuchtungseinrichtung eines Kraftfahrzeugs
WO2015058227A1 (fr) 2013-10-25 2015-04-30 Zizala Lichtsysteme Gmbh Module d'éclairage à micro-projection destiné à un projecteur de véhicule automobile
JP2015115165A (ja) * 2013-12-11 2015-06-22 スタンレー電気株式会社 車両用灯具及びレンズ体
CN104100909A (zh) * 2014-08-04 2014-10-15 安徽师范大学 一种基于复眼透镜的自适应前照灯设计方法
CN105135321A (zh) * 2015-09-30 2015-12-09 成都恒坤光电科技有限公司 一种前照灯及用于该前照灯的光线反射分离转换装置
CN105180058A (zh) * 2015-09-30 2015-12-23 成都恒坤光电科技有限公司 一种前照灯及用于该前照灯的光线反射分离转换装置
WO2017066818A1 (fr) * 2015-10-23 2017-04-27 Zkw Group Gmbh Module lumineux à microprojection pour un projecteur de véhicule à moteur servant à produire des répartitions de lumière sans aberration
KR20180078951A (ko) * 2016-12-30 2018-07-10 에스엘 주식회사 차량용 램프

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Publication number Priority date Publication date Assignee Title
EP4015896A1 (fr) * 2020-12-18 2022-06-22 ZKW Group GmbH Dispositif de projection pour un phare de véhicule automobile

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